Hi I'm 48 and been colouring my own hair for 25 years now to cover the grey. I've tried all the major brands and not had any problems any of them. My only advice is if you are brown like me (ok grey, but I was dark brown) it is probably better to go for a slightly lighter shade.
I don't think it looks quite as good when you do it yourself, but hairdressers are just so expensive I can't afford to have it done there.